A large rock body that moves as a unit along a planar surface would be classified as a rock slide.
A big mass of rock rolling down a slope is known as a rock slide, sometimes also known as Landslides. Most rock slides are translational slope failures because the movement almost always occurs parallel to a fracture, bedding plane, or metamorphic foliation plane. The movement might be either extremely sluggish or somewhat fast.
All 50 states in the US experience landslides. The coastal and mountainous parts of California, Oregon, and Washington, that make up the intermountain west, the mountainous and hilly sections of the Eastern United States, and the intermountain west are the main locations of landslide occurrence and potential.
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